305563 has 2 divisors, whose sum is σ = 305564. Its totient is φ = 305562.

The previous prime is 305551. The next prime is 305581. The reversal of 305563 is 365503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305563 - 2¹³ = 297371 is a prime.

It is not a weakly prime, because it can be changed into another prime (305533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152781 + 152782.

It is an arithmetic number, because the mean of its divisors is an integer number (152782).

2³⁰⁵⁵⁶³ is an apocalyptic number.

305563 is a deficient number, since it is larger than the sum of its proper divisors (1).

305563 is an equidigital number, since it uses as much as digits as its factorization.

305563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 305563 is about 552.7775321049. Note that the first 3 decimals coincide. The cubic root of 305563 is about 67.3545473354.

It can be divided in two parts, 305 and 563, that added together give a palindrome (868).

The spelling of 305563 in words is "three hundred five thousand, five hundred sixty-three".